diff options
Diffstat (limited to 'arch/arm64/crypto/sha2-ce-glue.c')
| -rw-r--r-- | arch/arm64/crypto/sha2-ce-glue.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/arch/arm64/crypto/sha2-ce-glue.c b/arch/arm64/crypto/sha2-ce-glue.c deleted file mode 100644 index 6b4866a88ded..000000000000 --- a/arch/arm64/crypto/sha2-ce-glue.c +++ /dev/null @@ -1,192 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * sha2-ce-glue.c - SHA-224/SHA-256 using ARMv8 Crypto Extensions - * - * Copyright (C) 2014 - 2017 Linaro Ltd <ard.biesheuvel@linaro.org> - */ - -#include <asm/neon.h> -#include <asm/simd.h> -#include <linux/unaligned.h> -#include <crypto/internal/hash.h> -#include <crypto/internal/simd.h> -#include <crypto/sha2.h> -#include <crypto/sha256_base.h> -#include <linux/cpufeature.h> -#include <linux/crypto.h> -#include <linux/module.h> - -MODULE_DESCRIPTION("SHA-224/SHA-256 secure hash using ARMv8 Crypto Extensions"); -MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS_CRYPTO("sha224"); -MODULE_ALIAS_CRYPTO("sha256"); - -struct sha256_ce_state { - struct sha256_state sst; - u32 finalize; -}; - -extern const u32 sha256_ce_offsetof_count; -extern const u32 sha256_ce_offsetof_finalize; - -asmlinkage int __sha256_ce_transform(struct sha256_ce_state *sst, u8 const *src, - int blocks); - -static void sha256_ce_transform(struct sha256_state *sst, u8 const *src, - int blocks) -{ - while (blocks) { - int rem; - - kernel_neon_begin(); - rem = __sha256_ce_transform(container_of(sst, - struct sha256_ce_state, - sst), src, blocks); - kernel_neon_end(); - src += (blocks - rem) * SHA256_BLOCK_SIZE; - blocks = rem; - } -} - -const u32 sha256_ce_offsetof_count = offsetof(struct sha256_ce_state, - sst.count); -const u32 sha256_ce_offsetof_finalize = offsetof(struct sha256_ce_state, - finalize); - -asmlinkage void sha256_block_data_order(u32 *digest, u8 const *src, int blocks); - -static void sha256_arm64_transform(struct sha256_state *sst, u8 const *src, - int blocks) -{ - sha256_block_data_order(sst->state, src, blocks); -} - -static int sha256_ce_update(struct shash_desc *desc, const u8 *data, - unsigned int len) -{ - struct sha256_ce_state *sctx = shash_desc_ctx(desc); - - if (!crypto_simd_usable()) - return sha256_base_do_update(desc, data, len, - sha256_arm64_transform); - - sctx->finalize = 0; - sha256_base_do_update(desc, data, len, sha256_ce_transform); - - return 0; -} - -static int sha256_ce_finup(struct shash_desc *desc, const u8 *data, - unsigned int len, u8 *out) -{ - struct sha256_ce_state *sctx = shash_desc_ctx(desc); - bool finalize = !sctx->sst.count && !(len % SHA256_BLOCK_SIZE) && len; - - if (!crypto_simd_usable()) { - if (len) - sha256_base_do_update(desc, data, len, - sha256_arm64_transform); - sha256_base_do_finalize(desc, sha256_arm64_transform); - return sha256_base_finish(desc, out); - } - - /* - * Allow the asm code to perform the finalization if there is no - * partial data and the input is a round multiple of the block size. - */ - sctx->finalize = finalize; - - sha256_base_do_update(desc, data, len, sha256_ce_transform); - if (!finalize) - sha256_base_do_finalize(desc, sha256_ce_transform); - return sha256_base_finish(desc, out); -} - -static int sha256_ce_final(struct shash_desc *desc, u8 *out) -{ - struct sha256_ce_state *sctx = shash_desc_ctx(desc); - - if (!crypto_simd_usable()) { - sha256_base_do_finalize(desc, sha256_arm64_transform); - return sha256_base_finish(desc, out); - } - - sctx->finalize = 0; - sha256_base_do_finalize(desc, sha256_ce_transform); - return sha256_base_finish(desc, out); -} - -static int sha256_ce_digest(struct shash_desc *desc, const u8 *data, - unsigned int len, u8 *out) -{ - sha256_base_init(desc); - return sha256_ce_finup(desc, data, len, out); -} - -static int sha256_ce_export(struct shash_desc *desc, void *out) -{ - struct sha256_ce_state *sctx = shash_desc_ctx(desc); - - memcpy(out, &sctx->sst, sizeof(struct sha256_state)); - return 0; -} - -static int sha256_ce_import(struct shash_desc *desc, const void *in) -{ - struct sha256_ce_state *sctx = shash_desc_ctx(desc); - - memcpy(&sctx->sst, in, sizeof(struct sha256_state)); - sctx->finalize = 0; - return 0; -} - -static struct shash_alg algs[] = { { - .init = sha224_base_init, - .update = sha256_ce_update, - .final = sha256_ce_final, - .finup = sha256_ce_finup, - .export = sha256_ce_export, - .import = sha256_ce_import, - .descsize = sizeof(struct sha256_ce_state), - .statesize = sizeof(struct sha256_state), - .digestsize = SHA224_DIGEST_SIZE, - .base = { - .cra_name = "sha224", - .cra_driver_name = "sha224-ce", - .cra_priority = 200, - .cra_blocksize = SHA256_BLOCK_SIZE, - .cra_module = THIS_MODULE, - } -}, { - .init = sha256_base_init, - .update = sha256_ce_update, - .final = sha256_ce_final, - .finup = sha256_ce_finup, - .digest = sha256_ce_digest, - .export = sha256_ce_export, - .import = sha256_ce_import, - .descsize = sizeof(struct sha256_ce_state), - .statesize = sizeof(struct sha256_state), - .digestsize = SHA256_DIGEST_SIZE, - .base = { - .cra_name = "sha256", - .cra_driver_name = "sha256-ce", - .cra_priority = 200, - .cra_blocksize = SHA256_BLOCK_SIZE, - .cra_module = THIS_MODULE, - } -} }; - -static int __init sha2_ce_mod_init(void) -{ - return crypto_register_shashes(algs, ARRAY_SIZE(algs)); -} - -static void __exit sha2_ce_mod_fini(void) -{ - crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); -} - -module_cpu_feature_match(SHA2, sha2_ce_mod_init); -module_exit(sha2_ce_mod_fini); |